Adjusting mechanism for master copies on duplicating machines and the like



Dec. 8, 1953 M. J. AJAM ETAL ADJUSTING MECHANISM FOR MASTER COPIES ONDUPLICATING MACHINES AND THE LIKE Filed Oct. 4, 1950 172mm Z'o n Car]flier-yam n Musafa J. 4J0; .losepbf aro 00:

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Patented Dec. 8, 1953 COPIES AND THE LIKE ON DUPLICATING MACHINESMustafa J. Ajam, Amherst, N. H., and Joseph R.

Paradis, Malden, and Carl A. Bergman, Melrose, Mass., assignors toStandard Duplicating Machines Corporation ration of MassachusettsApplication October 4, 1950, Serial No. 188,392 4 Claims. (01. 101-248)The present invention relates to mechanism for adjusting the position ofthe master copy used on fluid duplicating machines with respect to theposition of the printing on the clear sheet on which the copy isreproduced.

As fluid duplicating machines are used fo more and more purposes,perfect registration of the printing on the clear sheet has become moreand more important; also the ability to adjust the position quickly andwith great accuracy;

The importance of this can be illustrated by con- For instance, if aprice-list has already been printed with blank spaces for pricesopposite particular items, the blank spaces may be filled in by aduplicating machine. Often some price figures are added after othershave been put in. Unless each price figure is placed precisely in linewith the item to which it applies, a person receiving the price-list maymistake the price of the item, and confusion or even loss may result.Also, it is important that the operator of the duplicating machine shallbe able to correct any misalinement instantly and accurately uponexamining the first or second copy which is made by the machine. Sincesuch copies are frequently made in a hurry, it is essential that thenecessary adjustment should be capable of being made instantly,certainly and without efiort. v

The mechanism embodying the present invention provides simple easilyoperated mechanism for moving the printing up or down on the clear sheetso that it will fall in precisely the desired position, particularlywith relation to other printing which may be on the clear sheet already.This result is achieved by shifting the driven gear on the platen ordrum shaft angularly of the drum by means of a thumb wheel located atthe end of the drum in position to be under the thumb of the operatorwhen the drum is in the normal stopping position.

The invention will be fully understood from the following descriptiontaken in connection with the accompanying drawings, in which:

Fig. 1 is a plan view of a drum or platen of a fluid duplicating machinembodying our in vention, the drum being shown as broken away to showthe mechanism;

Fig. 2 is a view of the left-hand end of the parts showninFig. 1; and

Fig. 3 is a detail of the adjusting mechanism separated from the otherparts.

Referring now to the drawings, the drum is indicated at II, the shaft atI2, and the driven gear at I3. It will be understood that the gearEverett, Mass, 2. corpo- I3 is movable angularly of the drum II and thatsuch movement changes the angular position of the drum with respect toth position of the feed rolls '(not shown) and consequently varies theposition of the clear sheet'with respect to the master copy by advancingor retarding the time when the front edge of the clear sheet arrives atthe bite of the pressure roll and the drum, all as has been explained inthe patent to Storck Reissue N0. 19,951.

The drum II is provided with an indicating mark 40 adjacent scale II onthe frame 42 of the machine. This scale is conveniently calibrated toindicate lines of type as printed by a standard typewriter. The presentinvention provides mechanism for making this angular adjustment moreeasily, quickly and accurately.

At I4 is shown a stud having a body I5 and a screw-threaded boretherein. The stud I4 is received in a hole in the spoke I! of gear I3and can rotate slightly as the adjustment takes place. A screw shaft I9is received within the screwthreaded bore of the body I5 of the stud I4,and has a bevel gear 20 thereon. The screw shaft l9 passes through thearms 22 and 23 of a yoke 24 which is pivoted on the end of a shaft 21which extends lengthwise of the drum II and is rotatable in the spokes26, 26 forming part of the ends of the drum. This shaft 21 has at oneend a bevel gear 28 which meshes with the bevel gear 20 and on the otherend a thumb wheel 30 whose knurled periphery extends through a hole 3|cut in the end edge of the drum sufficiently to allow the operator toturn the wheel 30 by his thumb. Th end of the screw-shaft I9 extendsbeyond the gear 20 into a bearing in the arm 23 of the yoke 24.

After the operator has run a sheet or two through the machine andinspected to see whether the printing is properly positioned up or downon the sheet, the thumb wheel 30 may be turned in the proper directionto adjust the printing up or down to the correct position. Moving thethumb wheel 30 turns the shaft 2'! and the bevel gear 28 which in turnrotates the bevel gear 20 and the screw shaft I9. This pulls or pushesthe body I5 of the stud I 4 toward or away from the yoke 24. Since theyoke 24 is carried by the drum II and the stud I4 by the driven gear I3,this changes the angular relation of the drum and gear and consequentlymoves the position of the master copy up or down with relation to thecopy sheet. The position of the thumb-wheel on the top of the drumenables the operator to make the adjust- 3 ment easily and quickly, andin the machine shown herein, movement of the indicator mark 40 one spaceon scale 4| shifts the master copy up or down, asthe case may be oneline. Of course, it will be" understood that, the drum may be moved moreor less than the amount of one line to improve the alinement of the workon the 5 copy sheet as may be required.

We claim:

1. In a liquid duplicating machine or the like and in combination with adrum and a driven gear therefor coaxial with the drum the means forshifting the drum and the gear angularly with respect to each otherwhich comprises a stud in engagement with the driven gear, a screw shaftthreadedly engaging the stud, a bevel gear on said screw shaft, a shaftcarried by the drum, a yoke having bearings for the screw shaft andbeing pivotally mounted on the drum and to support the screw shaft forpivotal movement relative to the drum and provided with a bearing forthe shaft on the drum, a second bevel gear on the said shaft andengaging the first mentioned bevel gear, and a, thumb wheel on the shaftcarried by the drum.

2. In a liquid duplicating machine or the like and in combination with aframe, a drum having a cut-out place in the edge of the drum adjacentthe frame of the machine and a driven gear therefor coaxial with thedrum the means for shifting the drum and the gear angularly with respectto each other which comprises a stud in engagement with the driven gear,a screw shaft threadedly engaging the stud, a bevel gear on said screwshaft, a shaft carried by the drum, a yoke having bearings for the screwshaft and being pivotally mounted on the drum to support the screw shaftfor pivotal movement relative to the drum and provided with a bearingfor the shaft on the drum, a second bevel gear on the said shaft andengaging the first mentioned bevel gear, and a thumb wheel on the shaftcarried by the drum and located in said cut-out place in the edge of thedrum.

3. In a liquid duplicating machine or the like and in combination with aframe, a drum hava cut-out place in the edge of the drum ad'- jac'entthe frame of the machine and having an indicating mark at the edge ofthe drum and a driven gear therefor coaxial with the drum the means forshifting the drum and the gear angularly with respect to each otherwhich comprises a stud in engagement with the driven gear,

a screw shaft threadedly engaging the stud, a bevel gear on said screwshaft, a shaft carried by the drum, a yoke having bearings for the screwshaft and being pivotally mounted on the drum to support the screw shaftfor pivotal movement relative to the drum and provided with a bearingfor the shaft on the drum, a second bevel gear on the said shaft andengaging the first mentioned bevel gear, and a thumb wheel on the shaftcarried by the drum and located in said cut-out place in the edge of thedrum, the frame ofthe machine having a scale thereon adjacent theindicating mark on the drum.. a

4. In a liquid duplicating machine or the like having in combination aframe, a drum having a cut-out place in the edge of the drum adjacentthe frame of the machine, indicating marks at one edge of the drum,corresponding indicating marks on the frame adjacent one edge of thedrum, a driven gear coaxial with the drum and having a hole in the sidethereof, means for shifting the drum and gear angularly with respect toeach other, including a stud received in and rotatable in said hole, ascrew shaft threadedly engaging the stud, said screw shaft beingsupported in a yoke, said yoke being pivotally mounted inside the drumto support the screw shaft for pivotal movement relative to the drum, abevel gear on said screw shaft, a shaft carried by the drum having oneend journalled in said yoke and extending longitudinally inside thedrum, 9. bevel gear at one end of the shaft carried by the drum and inengagement with the bevel gear on the screw shaft and a thumb wheel onthe shaft carried by the drum located in said cut-out place in the edgeof the drum.

MUSTAFA J. AJAM.

JOSEPH R. PARADIS. CARL A. BERGMAN.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,305,890 Flick June 3, 1919 1,328,842 Marquardt Jan. 27, 19201,868,385 Greenwood July 19, 1932 2,030,027 Greenwood Feb. 4, 19362,308,117 Snyder Jan. 12, 1943 2,536,679 Fay Jan. 2, 1951 2,557,866Eserk-aln et a1. June 19, 1951

